Effect of doped ceria interlayer on cathode performance of the electrochemical cell using proton conducting oxide

Sakai, Takaaki; Matsushita, Shotaro; Hyodo, Junji; Okuyama, Yuji; Matsuka, Maki; Ishihara, Tatsumi; Matsumoto, Hiroshige

doi:10.1016/j.electacta.2012.04.102

Cited by 7 publications

(5 citation statements)

References 35 publications

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“…Similar thermodynamic calculation results were obtained for SrCeO 3 indicating its chemical instability in H 2 O. 75 The instability of cerates in H 2 O has been also confirmed experimentally, 76 suggesting that more stable electrolyte materials are necessary for practical applications of electrolysis cells.…”

Section: Proton-conducting Electrolyte Materials For Soecssupporting

confidence: 63%

“…In contrast to the instability of cerate proton-conducting oxides, zirconate proton-conducting oxides (such as SrZrO 3 and BaZrO 3 ) have been predicted to be thermodynamically stable in H 2 O, 75,77 since the standard Gibbs free energy change (DG 0 ) values for the possible reactions SrZrO 3 + H 2 O -Sr(OH) 2 + ZrO 2 and BaZrO 3 + H 2 O -Ba(OH) 2 + ZrO 2 are positive down to temperatures as low as B50 1C. Since DG 0 values increase upon increasing the temperature, the chemical stability in water of SrZrO 3 and BaZrO 3 -based materials improves with increasing temperatures accordingly.…”

Section: Proton-conducting Electrolyte Materials For Soecsmentioning

confidence: 99%

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Steam electrolysis by solid oxide electrolysis cells (SOECs) with proton-conducting oxides

2014

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Energy crisis and environmental problems caused by the conventional combustion of fossil fuels boost the development of renewable and sustainable energies. H2 is regarded as a clean fuel for many applications and it also serves as an energy carrier for many renewable energy sources, such as solar and wind power. Among all the technologies for H2 production, steam electrolysis by solid oxide electrolysis cells (SOECs) has attracted much attention due to its high efficiency and low environmental impact, provided that the needed electrical power is generated from renewable sources. However, the deployment of SOECs based on conventional oxygen-ion conductors is limited by several issues, such as high operating temperature, hydrogen purification from water, and electrode stability. To avoid these problems, proton-conducting oxides are proposed as electrolyte materials for SOECs. This review paper provides a broad overview of the research progresses made for proton-conducting SOECs, summarizing the past work and finding the problems for the development of proton-conducting SOECs, as well as pointing out potential development directions.

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Section: Proton-conducting Electrolyte Materials For Soecssupporting

confidence: 63%

Section: Proton-conducting Electrolyte Materials For Soecsmentioning

confidence: 99%

Steam electrolysis by solid oxide electrolysis cells (SOECs) with proton-conducting oxides

2014

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“…[12][13][14][15][16][17][18][19] As is the case with alkaline electrolysis, 20 the anode reaction, i.e., the oxygen evolution reaction (OER), has been recognized to cause significantly larger overpotentials than the hydrogen evolution reaction (HER) at the cathodes in H + −SOECs. 9,21,22 Nonetheless, systematic investigations of the electrode reactions are still scarce. 23,24 In this study, the reaction orders of the anodic polarization resistances with respect to oxygen and water partial pressures were determined by means of electrochemical impedance spectroscopy for the cells comprising the BaZr 0.4 Ce 04 Y 0.2 O 3−δ electrolyte and commonly-used…”

mentioning

confidence: 99%

Analysis of the Anode Reaction of Solid Oxide Electrolyzer Cells with BaZr_0.4Ce_0.4Y_0.2O_3-_δElectrolytes and Sm_0.5Sr_0.5CoO_3-_δAnodes

Kobayashi

Kuroda

Jeong

et al. 2018

J. Electrochem. Soc.

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Anodic reaction pathways in proton-conducting solid oxide electrolyzer cells (H + −SOECs) were investigated using electrochemical impedance spectroscopy with a cell structure of Sm 0.5 Sr 0.5 CoO 3 (anode) | BaZr 0.4 Ce 0.4 Y 0.2 O 3-δ | Pt (cathode). Densely sintered BaZr 0.4 Ce 0.4 Y 0.2 O 3-δ ceramics (>97% relative density) were fabricated by a reactive sintering process with a 2 mol% Zn(NO 3 ) 2 additive and were applied as the electrolyte. The impedance spectra were measured while the oxygen (p O2 ) and water partial pressures (p H2O ) in the anode side were systematically varied, which revealed that the SOECs have two polarization resistances at the anode side, one proportional to p O2 −1/4 and p H2O 0 and another insensitive to p O2 and p H2O . A comparison between the experimental results and elementary step modeling revealed that the actual anode reactions could be described by the reverse mode H + -SOFC cathode reactions, and, thus, the elementary steps dominating the anodic polarization resistance were assigned.

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“…Besides being the smallest existing atom, hydrogen can gain or lose one electron, forming the proton or the hydride ion; consequently, proton detection is complex, and the determination of how they are present in the compound's formula is still often unknown [65]. Nowadays, there are diverse techniques that can be used to detect protons, including direct methods (such as neutron scattering [66], nuclear magnetic resonance [67], and gas chromatography [68]) or indirect ones (like thermogravimetry [69]). All of them are supported by an initial hypothesis regarding the formed/evolved species [70].…”

Section: Ceramic Oxidesmentioning

confidence: 99%

A Review on Low-Temperature Protonic Conductors: Principles and Chemical Sensing Applications

Mendes,

da Silva,

Araújo

et al. 2024

Chemosensors

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Proton conductors are ceramic materials with a crystalline or amorphous structure, which allow the passage of an electrical current through them exclusively by the movement of protons: H+. Recent developments in proton-conducting ceramics present considerable promise for obtaining economic and sustainable energy conversion and storage devices, electrolysis cells, gas purification, and sensing applications. So, proton-conducting ceramics that combine sensitivity, stability, and the ability to operate at low temperatures are particularly attractive. In this article, the authors start by presenting a brief historical resume of proton conductors and by exploring their properties, such as structure and microstructure, and their correlation with conductivity. A perspective regarding applications of these materials on low-temperature energy-related devices, electrochemical and moisture sensors, is presented. Finally, the authors’ efforts on the usage of a proton-conducting ceramic, polyantimonic acid (PAA), to develop humidity sensors, are looked into.

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Effect of doped ceria interlayer on cathode performance of the electrochemical cell using proton conducting oxide

Cited by 7 publications

References 35 publications

Steam electrolysis by solid oxide electrolysis cells (SOECs) with proton-conducting oxides

Steam electrolysis by solid oxide electrolysis cells (SOECs) with proton-conducting oxides

Analysis of the Anode Reaction of Solid Oxide Electrolyzer Cells with BaZr_0.4Ce_0.4Y_0.2O_3-_δElectrolytes and Sm_0.5Sr_0.5CoO_3-_δAnodes

A Review on Low-Temperature Protonic Conductors: Principles and Chemical Sensing Applications

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Effect of doped ceria interlayer on cathode performance of the electrochemical cell using proton conducting oxide

Cited by 7 publications

References 35 publications

Steam electrolysis by solid oxide electrolysis cells (SOECs) with proton-conducting oxides

Steam electrolysis by solid oxide electrolysis cells (SOECs) with proton-conducting oxides

Analysis of the Anode Reaction of Solid Oxide Electrolyzer Cells with BaZr0.4Ce0.4Y0.2O3-δElectrolytes and Sm0.5Sr0.5CoO3-δAnodes

A Review on Low-Temperature Protonic Conductors: Principles and Chemical Sensing Applications

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Analysis of the Anode Reaction of Solid Oxide Electrolyzer Cells with BaZr_0.4Ce_0.4Y_0.2O_3-_δElectrolytes and Sm_0.5Sr_0.5CoO_3-_δAnodes